as you know, the government has not actually said who they think is culpable for this attack. so it's going -- we're going to see this played out over the next couple of days or maybe weeks. >> do you think they know? >> i don't believe actually they know. if they knew, let's say, a terrorist organization that was a foreign terrorist organization, they would have said something by now. i think the smart thing to do is to let the law enforcement folks and the intelligence folks do their business, because this is what they've been doing for the last ten years. >> were you surprised that something like this could happen at a boston marathon? >> not at all. the boston marathon is obviously a very high profile american event. a lot of people are there. cameras are there. the media is there. and if i were a terrorist, i would want to attack something like this. >> so it's only natural that someone who wants to attack us would use this venue. >> they would use this thing because it's a high profile event. they knew that whoever did this, whether it's an individual or an organization,